Curse Episodes is a Half-Life 2 single player total conversion : a mix of physics based combat, puzzles and exploration. In the first episode you can explore an egyptian necropolis and kill mummies, monsters with a morning star.

I beat Nightmare Mode in all three, but when I went to go teleport to the next level, expecting something that appears in this photo. But rather, the teleporter's particle effect simply disappeared, leaving an Ankh at the back, and nothing more. Curious. I'll go look at it again.

CustomCharacter - you failed :)
The entrance to last boss room is located near the last portal which have to disappear, because mod developers created it that way - the mod is over, when the credits pop-up :P